I Picked up an Ancient Wife in the Sewer

It took three years for her to take the public examination, and the first sword she landed on the beach was to kill me, the person she liked. Delivering food late at night, I picked up a starved and fainted daughter of an ancient general beside a manhole cover. In order to send her back, she found out that she needed a kiss to travel through time. This is a mechanism that some guy came up with. Light comedy/slightly sweet/intense internet memes/the male protagonist is arrogant but really does it when he has something to say